Liquid crystal display panel

Abstract

A liquid crystal display panel having an upsized display area of the present invention includes source wirings composed of a plurality of wiring sections, respective parts of which are connected to each other. At least one of the plurality of wiring sections is connected to a pixel electrode via an active element. The source wirings are arranged such that the plurality of wiring sections can be enclosed within a light shielding region. The described liquid crystal display panel suppresses an occurrence of a wiring disconnection inferior accompanying when upsizing the display area and improving a definition, and thus can be manufactured at a higher yield. It is preferable that the source wirings are arranged in a form of a ladder and are formed by laminating a plurality of electrically conductive films. It is also preferable that in the crossover where the gate wirings cross each other, at least a width of either one of the wirings is reduced. The described liquid crystal panel enables a quality display while suppressing an occurrence of a wiring disconnection.

Claims

1. A liquid crystal display panel, comprising:

a pair of transparent substrates placed so as to face each other;

a plurality of pixel electrodes formed on one of said pair of transparent substrates;

a light shielding section formed to surround each of said plurality of pixel electrodes;

a plurality of active elements connected to said plurality of pixel electrodes respectively;

source wirings connected to said plurality of pixel electrodes via said active elements, each of said source wirings being composed of a plurality of wiring sections which are connected so as to provide a plurality of different signal paths to the active elements connected thereto; and

gate wirings formed so as to cross said source wirings, said gate wirings being connected to said pixel electrodes via said active element.

2. The liquid crystal display panel as set forth in claim 1, wherein:

said plurality of source wirings are arranged in a form of a ladder.

3. The liquid crystal display panel as set forth in claim 1, wherein:

said plurality of source wirings are formed by a laminated layer of a plurality of electrically conductive films.

4. The liquid crystal display panel as set forth in claim 3, wherein:

said plurality of electrically conductive films are made of the same material as that adopted in said plurality of pixel electrodes.

5. The liquid crystal display panel as set forth in claim 1, wherein:

at least a width of said source wirings or said gate wiring is reduced at a crossover where respective wirings cross each other.

6. The liquid crystal display panel as set forth in claim 1, wherein said source wirings are enclosed within an area of said light shielding section.

7. A liquid crystal display panel, comprising:

a plurality of active matrix type liquid crystal panels, each of said plurality of active matrix type liquid crystal panels including:

a pair of transparent substrates placed so as to face each other;

a plurality of pixel electrodes formed on one of said pair of transparent substrates;

a light shielding section formed to surround each of said plurality of pixel electrodes;

a plurality of active elements connected to said plurality of pixel electrodes respectively;

source wirings connected to said plurality of pixel electrodes via said active elements, each of said source wirings being composed of a plurality of wiring sections which are connected so as to provide a plurality of different signal paths to the active elements connected thereto; and

gate wirings formed so as to cross said source wirings, said gate wirings being connected to said pixel electrodes via said active elements respectively,

wherein the plurality of active matrix type liquid crystal panels are connected adjacently side to side on a plane to form one large-sized panel.

8. The liquid crystal display panel as set forth in claim 7, wherein:

said plurality of source wirings are arranged in a form of a ladder.

9. The liquid crystal display panel as set forth in claim 7, wherein:

said plurality of source wirings are formed by a laminated layer of a plurality of electrically conductive films.

10. The liquid crystal display panel as set forth in claim 9, wherein:

said plurality of electrically conductive films are made of the same material as that adopted in said plurality of pixel electrodes.

11. The liquid crystal display panel as set forth in claim 7, wherein:

at least a width of said source wirings or said gate wirings is reduced at a crossover where respective wirings cross each other.

12. The liquid crystal display panel as set forth in claim 7, further comprising:

a transparent bonding agent layer prepared on one surface of said large panel; and

a reinforcing substrate laminated on said large-sized panel via said transparent bonding agent layer.

13. The liquid crystal display panel as set forth in claim 6, wherein:

a width of a joint at which said plurality of liquid crystal panels are connected to form said large-sized panel is not more than a distance between display pixels in said liquid crystal panels.

14. The liquid crystal display panel as set forth in claim 7, further comprising:

a pair of polarization plates formed on both front and back surfaces of said large panel in such a manner that respective polarization axes cross at a right angle.

15. The liquid crystal display panel as set forth in claim 6, wherein said source wirings are enclosed within an area of said light shielding section.

16. A liquid crystal display panel, comprising:

a pair of transparent substrates placed so as to face each other;

a plurality of pixel electrodes formed on one of said pair of transparent substrates;

a plurality of active elements connected to said plurality of pixel electrodes respectively;

a plurality source wirings connected to said pixel electrodes via said plurality of active elements, said plurality of source wirings being arranged in a form of a ladder;

gate wirings formed so as to cross said source wirings, said gate wirings being connected to said pixel electrodes via said active elements.

17. The liquid crystal display panel as set forth in claim 16, further comprising:

a light shielding section formed to cover regions surrounding said plurality of pixel electrodes including the regions in which said source wirings are formed.

18. The liquid crystal display panel as set forth in claim 16, wherein at least one of said gate wirings and said source wirings have reduced widths at the respective crossings of said gate wirings and said source wirings.

19. A liquid crystal display device, comprising two or more of the liquid crystal panels of claim 16 arranged side-by-side.

20. A liquid crystal display panel comprising:

first and second transparent substrates arranged with inner surfaces thereof facing each other;

gate wirings formed on the inner surface of said first transparent substrate;

source wirings formed on the inner surface of said first transparent substrate and extending so as to cross said gate wirings;

pixel electrodes formed on the inner surface of said first transparent substrate; and

switching elements each having a first terminal connected to one of said source wirings, a second terminal connected to one of said pixel electrodes and a control terminal connected to one of said gate wirings,

wherein each of said source wirings comprises one or more layers of conductive material, at least one of said layers being configured to provide redundant signal paths to the switching elements connected thereto.

21. The liquid crystal display panel as set forth in claim 20, wherein the width of at least one of said gate wirings and said source wirings is reduced at the respective crossings of said gate wirings and said source wirings.

22. The liquid crystal display panel as set forth in claim 20, wherein said source wirings comprise an.alpha.-Ta layer and an ITO layer.

23. The liquid crystal display panel as set forth in claim 20, wherein the at least one layer of said source wirings comprises parallel source wiring sections which are connected by connecting portions extending therebetween.

24. The liquid crystal display panel as set forth in claim 20, further comprising:

a light shielding section formed to cover regions surrounding said plurality of pixel electrodes including the regions in which said source wirings are formed.

25. A liquid crystal display device comprising two or more of the liquid crystal display panels as set forth in claim 20 arranged side-by-side.